Umbrella-Case., patent, November 7, 1899; (https://texashistory.unt.edu/ark:/67531/metapth514723/m1/1/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Umbrella-Case., patent, November 7, 1899; (https://texashistory.unt.edu/ark:/67531/metapth514723/m1/1/: accessed July 8, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .